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iren2701 [21]
3 years ago
8

13x + 15=17x-13 solve for the solution

Mathematics
1 answer:
Archy [21]3 years ago
6 0

Answer: x=7

Step-by-step explanation:

Step 1: Subtract 17x from both sides.

13x+15−17x=17x−13−17x

−4x+15=−13

Step 2: Subtract 15 from both sides.

−4x+15−15=−13−15

−4x=−28

Step 3: Divide both sides by -4.

−4x/−4 =−28/−4

x=7

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A 96 foot tree casts a shadow that is 120 feet long. What is the angle of elevation of the sun? Round to the nearest degree.
zysi [14]

Answer:

\alpha \approx 39^{\circ}

Step-by-step explanation:

Let assume that tree grows perpendicular to surface. The statement is geometrically represented in the attachment included below, which resembles a right-angled triangle. Lastly, the angle of elevation of the sun is determined with the help of the following trigonometric relationship:

\tan \alpha = \frac{96\,ft}{120\,ft}

\tan \alpha = \frac{4}{5}

\alpha = \tan^{-1}\left(\frac{4}{5} \right)

\alpha \approx 38.660^{\circ}

\alpha \approx 39^{\circ}

4 0
3 years ago
Find the total surface area of the following cone. Leave your answer in terms of Pi. 4cm 3cm
castortr0y [4]

The triangle formed from the height of the cone and the radius of its base is a special 3,4,5 triangle. The slant height is 5cm.

Recall that the area of a circle = pi*r^2

Substitute 3 in for r

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SA = pi*r*l + B

Substitute our values into the equation

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5 0
2 years ago
A t-shirt decreased in price by
snow_tiger [21]

Answer:

£20

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1-1/4=3/4

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7 0
2 years ago
A rectangular prism has a volume of 840 cubic inches. The height of the prism is 6 inches and the width is 10 inches. Find the l
Yanka [14]
The volume of rectangular prism = length x height x width
so sub in the above equation we get
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3 0
3 years ago
Read 2 more answers
Two-ninths of a number is less than or equal to negative thirteen
polet [3.4K]

the number is x

2/9x \leq -13

multiply both sides by 9

2x \leq -117

divide both sides by 2

x\leq -58 1/2

6 0
3 years ago
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